BACGroTM Violet Red Bile Glucose Agar (VRBG), when prepared as directed, is intended for the detection and enumeration of Enterobacteriaceae from food and dairy products. BACGroTM VRBG conforms to ISO 11133:2014.
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Violet Red Bile Glucose Agar contains peptone to provide vitamins and minerals, as well as a carbon and nitrogen source. Yeast extract promotes bacterial growth by supplying B-complex vitamins. Glucose provides a carbohydrate source. Bile salts and crystal violet aid in the inhibition of Gram-positive bacteria. Neutral red is a pH indicator in which glucose-fermenters will produce red colonies and halos (due to bile precipitation). Sodium chloride conserves osmotic balance. Agar is a solidifying agent.
Peptone 7.0 g
Yeast Extract 3.0 g
Glucose 10.0 g
Bile Salts No. 3 1.5 g
Sodium Chloride 5.0 g
Neutral Red 0.03 g
Crystal Violet 0.002 g
Agar 15.0 g
Total 41.5 g/L
